#include <iostream>
const int MAX = 10;

int main( )
{
    using namespace std;
	double donation[MAX];
	
	int i = 0;
	cout << "doantion #" << i+1 << ":";
    while(i<MAX && cin >> donation[i]){
        if (++i<MAX)
			cout << "doantion #" << i+1 << ":";
    }
	double total = 0;
	for (int j = 0; j < i; ++j){
		total += donation[j];
	}
    if (i==0){
		cout << "No doantion\n";
	}else{
		cout << "average: " << total/i << endl;
	}
    return 0;
}
